TY - JOUR

T1 - Fatigue strength study based on geometric shape of bulk defects in cast steel

AU - Horvath, Michael

AU - Stoschka, Michael

AU - Fladischer, Stefan

PY - 2022/6/18

Y1 - 2022/6/18

N2 - This work applies Taylor’s Theory of Critical Distances (TCD) to assess the fatigue strength of defect-afflicted cast steel components made of G21Mn5+N. Based on radiographs of complexly shaped spatial imperfections, the established TCD-framework leads to a sound agreement of numerical and experimental fatigue strength. Moreover, a novel fatigue assessment methodology is presented, which bases on the projected planar defect shape, featuring an engineering-feasible design method without the need of extensive numerical simulations. About one-hundred additional imperfections referring to ASTM E446 class A and C validate the model, showing an average deviation of about five percent in fatigue strength.

AB - This work applies Taylor’s Theory of Critical Distances (TCD) to assess the fatigue strength of defect-afflicted cast steel components made of G21Mn5+N. Based on radiographs of complexly shaped spatial imperfections, the established TCD-framework leads to a sound agreement of numerical and experimental fatigue strength. Moreover, a novel fatigue assessment methodology is presented, which bases on the projected planar defect shape, featuring an engineering-feasible design method without the need of extensive numerical simulations. About one-hundred additional imperfections referring to ASTM E446 class A and C validate the model, showing an average deviation of about five percent in fatigue strength.

U2 - 10.1016/j.ijfatigue.2022.107082

DO - 10.1016/j.ijfatigue.2022.107082

M3 - Article

VL - 163.2022

JO - International Journal of Fatigue

JF - International Journal of Fatigue

SN - 0142-1123

IS - October

M1 - 107082

ER -